Article
2.4 GHz WiFi Spectrum Analyser
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This project takes advantage of certain parts of the circuitry in a 2.4GHz digital radio chip to make a simple spectrum analyser. This can give you a picture of which parts of the 2.4 GHz WiFi spectrum are being used in your immediate vicinity and even be used as an aid in optimising channel use and detection of interfering devices.
Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.
The use of our Gerber files is provided under a modified Creative Commons license. Creative Commons offers authors, scientists, educators and other creatives the freedom to handle their copyright in a more free way without losing their ownership.
PCB
Component list
Resistors
R1-R4 = 10kΩ
R5-R8 = 15kΩ
Semiconductors
D1,D2,D3 = 1N4001
Miscellaneous
MOD1 = Cypress module type CYWM6935
K1 = 25-way sub-D plug (male), angled pins, PCB mount
K2 = USB-B connector
PCB, ref. 070040-1
R1-R4 = 10kΩ
R5-R8 = 15kΩ
Semiconductors
D1,D2,D3 = 1N4001
Miscellaneous
MOD1 = Cypress module type CYWM6935
K1 = 25-way sub-D plug (male), angled pins, PCB mount
K2 = USB-B connector
PCB, ref. 070040-1
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